package com.yjetms.intercepter;

import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class LoginHandlerInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        Object user = request.getSession().getAttribute("LoginUsername");
        System.out.println("拦截器进入");
        System.out.println(request.getSession().getMaxInactiveInterval());
        if(user==null){
            System.out.println("session失效");
            request.setAttribute("msg","没有权限，请先登录！");
            request.getRequestDispatcher("/showlogin").forward(request,response);
            return false;
        }else{
            if(!CheckSessionAndDel.checkSession(request)){
                CheckSessionAndDel.delSecondUser(request,response);
                request.setAttribute("msg","你被挤下来了！");
                //System.out.println("进入了CheckSessionAndDel");
                request.getRequestDispatcher("/showlogin").forward(request,response);

                return false;
            }
            System.out.println(user);
            //已登录，放行
            return true;
        }
        //return HandlerInterceptor.super.preHandle(request, response, handler);
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        HandlerInterceptor.super.postHandle(request, response, handler, modelAndView);
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        HandlerInterceptor.super.afterCompletion(request, response, handler, ex);
    }
}
